[PATCH] docs: describe /proc/sys/net/ipv4/ping_group_range

[Vasiliy Kulikov <segooon@gmail.com>]

Copied the patch description from c319b4d76b9e with minor
formatting changes.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
---
 Documentation/networking/ip-sysctl.txt |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index d3d653a..3e119d9 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -717,6 +717,23 @@ icmp_errors_use_inbound_ifaddr - BOOLEAN
 
 	Default: 0
 
+ping_group_range - vector of 2 INTEGERs: min, max
+	Specify the group range allowed to create non-raw icmp sockets.
+
+	Possible applications:
+
+	1 0 (default) - nobody (not even root) may create ping sockets.
+
+	100 100 -  grant permissions to the single group to either make
+	/sbin/ping sgid'ed and owned by this group or to grant permissions
+	to the "netadmins" group.
+
+	0 4294967295 - enable it for the world.
+
+	100 4294967295 - enable it for the users, but not daemons.
+
+	Default: 1 0
+
 igmp_max_memberships - INTEGER
 	Change the maximum number of multicast groups we can subscribe to.
 	Default: 20
-- 
1.7.0.4